Copper-Catalyzed Intramolecular Oxidative CH Functionalization and CN Formation of 2-Aminobenzophenones: Unusual Pseudo-1,2-Shift of the Substituent on the Aryl Ring
A good move: A copper‐catalyzed intramolecular oxidative CH functionalization of 2‐aminobenzophenone affords two regioisomeric acridones (see scheme). The reaction involves an unusual pseudo‐1,2‐migration of R2 group(s) on the arene ring (bpy=2,2′‐bipyridine, DMAc=dimethylacetimide).
Synthesis of 10-Methylacridin-9(10<i>H</i>)-ones through Cu-Catalyzed Intramolecular Oxidative C(sp<sup>2</sup>)-H Amination of 2-(Methylamino)benzophenones
An efficient synthesis of a diverse set of 10-methylacridin-9(10H)-ones from 2-(methylamino)benzophenones has been developed. The reaction proceeds though Cu-catalyzed intramolecular aromatic C–H amination by using O2 as the sole oxidant to provide the desired products in moderate to good yields. In addition, 2-allylamino- and 2-(benzylamino)benzophenones as well as unprotected substrates can also
A Novel Palladium-Based Heterogeneous Catalyst for Tandem Annulation: A Strategy for Direct Synthesis of Acridones
作者:Darío C. Gerbino、H. Sebastián Steingruber、Pamela Mendioroz、M. Julia Castro、María A. Volpe
DOI:10.1055/s-0042-1751371
日期:2023.2
In order to develop an efficient, rapid, and modular cascade strategy for the direct synthesis of acridones, palladium supported on sulfated alumina and microwave activation are employed. Multifunctional heterogeneous palladium catalysts were prepared in order to carry out the sequential annulation via a Buchwald–Hartwig amination followed by an intramolecular annulation in a one-pot process. This
A one-pot synthesis of N-alkyl acridone via rhodium catalyzed decomposition of N-phenyl-2-(1-sulfonyl-1H-1,2,3-triazol-4-yl)aniline and subsequent oxidative C-C bond fragmentation has been developed. 14 examples are presented and the yields range from 30% to 80%. (C) 2015 Elsevier Ltd. All rights reserved.
Nitzsche, Chemische Berichte, 1943, vol. 76, p. 1187,1193